Stone me, it happened again last night ( 18th Jan). Some rubbish about radios not working causing delays. Big gaps on the Piccadilly and the shuttle between Acton Town and Rayners Lane. If the equipment is not working then I understand that the trains may not run. But once it is working? The trains are all there. Why on earth should we still have delays? Why don't the trains just start running again at the normal intervals?
I suspect the truth is that the moment there is a problem all the drivers take the rest of their shifts off, then when the trains are ready to restart, they have to wait for the next batch of drivers. Sod the travelling public, of course. We've had to pay in advance. Why on earth should anyone in LU give a toss?